The HITOP 300W digital aquarium heater is a large, powerful heater that is perfect for heating up large fish tanks. With a 10.6″ diameter and 2.8″ height, this heater is able to heat up to 93 degrees Fahrenheit in just 15 minutes. The heater features a blue powder coating that protects against corrosion and makes the heater last longer than other heaters on the market. The LED display makes it easy to read the temperature, and the external controller makes it easy to adjust the temperature. The tank heater comes with a 12 month warranty, so you can be confident in your purchase.